RecruitingClinical trialChildhood Cancer Predisposition Study (CCPS)The Childhood Cancer Predisposition Study (CCPS) is a multi-center, longitudinal, observational study that will collect clinical and biological data and specimens from children with a cancer predisposition syndromes (CPS) and their relatives. The central hypothesis is that studying individuals at high risk for childhood cancer creates a unique opportunity for improving the understanding of carcinogenesis, tumor surveillance, early detection, and cancer prevention, which will collectively contribute to improving care and outcomes for pediatric patients with cancer and those with cancer predisposition syndromes (CPS).